TDA4605 PDF

Типовые принципиалные схемы имульсных блоков питания на TDA Рис. Принципиальная схема импульсного блока питания на микросхемах tda, силовой ключ BUZ Функциональная схема импульсного блока питания на микросхеме TDA устройство и принцип действия Импульсные источники питания с устройствами управления на микросхеме TDA формируют вторичные напряжения U Un, количество и значение которых зависят от конструктивных особенностей бытовой техники.

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Regulating voltage : information input concerning secondary voltage. By comparing the regulating voltage obtained from the regulating winding of the transformer with the internal reference voltage, the output pulse width on Pin 5 is adapted to the load of the secondary side normal, overload, short circuit, no load 2 Primary current simulation : information input regarding the primary current.

The primary current rise in the primary winding is simulated at Pin 2 as a voltage rise by means of external RC element. When a value is reached that is derived from the regulating voltage at Pin 1, the output pulse at Pin 5 is terminated. The RC element serves to set the maximum power at the overload point. When the line voltage is too low the IC is switched-off by comparing V3 with an internal reference.

Voltage at Pin 3 is used for overload point compensation. Ground 5 Output : push-pull output for charge and discharge of the gate capacitance of the power MOS transistor. Start-up will begin with short pulses by connecting a capacitor between Pin 7 to ground.

This capacitor together with a resistor connected between Pin 7 and error amplifier output also as acts an integrator network for regulation. After starting oscillator, every zero transit of the feedback voltage falling edge triggers an output pulse at Pin 5. The trigger threshold is at typically - 50mV 1.

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